/Engine/Source/Editor/UnrealEd/Public/Commandlets/AssetRegistryGenerator.h
Used by DLC which does not Clone the entire global AR. Copies data from the global assetregistry for all packages present in the previous AssetRegistry
void CloneGlobalAssetRegistryFilteredByPreviousState ( const [FAssetRegistryState](API\Runtime\AssetRegistry\AssetRegistry\FAssetRegistryState) & PreviousState )